Search Publications
Statistical analysis of the energetic ion and ENA data for the Titan environment
Krupp, N.; Dandouras, I.; Garnier, P. +7 more
The MIMI experiment (Magnetosphere Imaging Instrument) onboard Cassini is dedicated to the study of energetic particles, with in particular LEMMS analyzing charged particles, or the INCA detector which can image the Energetic Neutral Atoms produced by charge exchange collisions between cold neutrals and energetic ions. The MIMI experiment is thus …
Trans-Neptunian Objects with Hubble Space Telescope ACS/WFC
Fuentes, Cesar I.; Holman, Matthew J.; Trilling, David E. +1 more
We introduce a novel search technique that can identify trans-Neptunian objects in three to five exposures of a pointing within a single Hubble Space Telescope (HST) orbit. The process is fast enough to allow the discovery of candidates soon after the data are available. This allows sufficient time to schedule follow-up observations with HST withi…
The Binary Fraction of the Young Cluster NGC 1818 in the Large Magellanic Cloud
de Grijs, Richard; Hu, Y.; Deng, L. +2 more
We use high-resolution Hubble Space Telescope imaging observations of the young (~15-25 Myr old) star cluster NGC 1818 in the Large Magellanic Cloud to derive an estimate for the binary fraction of F stars (1.3 < M sstarf/M sun < 1.6). This study provides the strongest constraints yet on the binary fraction in a young s…
The circumnuclear environment of the peculiar galaxy NGC3310
Terlevich, Roberto; Terlevich, Elena; Díaz, Ángeles I. +2 more
Gas and star velocity dispersions have been derived for eight circumnuclear star-forming regions (CNSFRs) and the nucleus of the spiral galaxy NGC3310 using high-resolution spectroscopy in the blue and far red. Stellar velocity dispersions have been obtained from the CaII triplet in the near-IR, using cross-correlation techniques, while gas veloci…
Three years of Ulysses dust data: 2005 to 2007
Dikarev, V.; Krüger, H.; Srama, R. +16 more
The Ulysses spacecraft has been orbiting the Sun on a highly inclined ellipse ( i=79∘, perihelion distance 1.3 AU, aphelion distance 5.4 AU) since it encountered Jupiter in February 1992. Since then it has made almost three revolutions about the Sun. Here we report on the final three years of data taken by the on-board dust detector. Du…
Variations in H2O+/H2O ratios toward massive star-forming regions
de Graauw, Th.; Falgarone, E.; Liseau, R. +63 more
Early results from the Herschel Space Observatory revealed the water cation H2O+ to be an abundant ingredient of the interstellar medium. Here we present new observations of the H2O and H2O+ lines at 1113.3 and 1115.2 GHz using the Herschel Space Observatory toward a sample of high-mass star-f…
The Redshifted Excess in Quasar C IV Broad Emission Lines
Punsly, Brian
In this paper, the Evans and Koratkar Atlas of Hubble Space Telescope Faint Object Spectrograph Spectra of Active Galactic Nuclei and Quasars is used to study the redward asymmetry in C IV broad emission lines (BELs). It is concluded that there is a highly significant correlation between the spectral index from 10 GHz to 1350 Å and the amount of e…
An empirical model for prediction of geomagnetic storms using initially observed CME parameters at the Sun
Cho, K. -S.; Kim, K. -H.; Moon, Y. -J. +7 more
In this study, we discuss the general behaviors of geomagnetic storm strength associated with observed parameters of coronal mass ejection (CME) such as speed (V) and earthward direction (D) of CMEs as well as the longitude (L) and magnetic field orientation (M) of overlaying potential fields of the CME source region, and we develop an empirical m…
PMAS optical integral field spectroscopy of luminous infrared galaxies. II. Spatially resolved stellar populations and excitation conditions
Colina, L.; Monreal-Ibero, A.; Arribas, S. +3 more
Context. The general properties (e.g., activity class, star formation rates, metallicities, extinctions, average ages, etc.) of luminous (LIRGs) and ultraluminous infrared galaxies (ULIRGs) in the local universe are well known because large samples of these objects have been the subject of numerous spectroscopic works over the past three decades. …
An approach to numerical simulation of the gas distribution in the atmosphere of Enceladus
Combi, M. R.; Tenishev, V.; Waite, J. H. +1 more
In addition to being the major source of neutral gas and dust particles for the Saturnian E-ring and, ultimately, heavy ions for the Saturnian inner magnetosphere, Enceladus exhibits geological activity that has made it an object of recent intensive study. The interest has significantly increased after Cassini flybys in 2005 provided a detailed ma…